The second-year receiver is questionable for the game with a shoulder injury. He orginally hurt it Nov. 24 against the Arizona Cardinals.
"I was completely healthy at this point last season, so that's the part that's not good," Hilton said. "It's one of those things that I have to play through. We still have something to play for."
The Colts, who are keeping their hopes alive to get to the No. 2 seed, could have a thin roster against the Chiefs.
Defensive tackle, Ricky Jean Francois (foot), offensive line Jeff Linkenbach (quad), safety Sergio Brown (groin), offensive lineman Joe Reitz (concussion) and defensive tackle Montori Hughes (knee) are all doubtful.
Here's what the Colts' offensive line could look like Sunday because of all their injuries at that position: Samson Satele at center, Anthony Castonzo and Gosder Cherilus at tackle and Xavier Nixon and Mike McGlynn at guard. Rookie Khaled Holmes will be the only backup if Thornton doesn't play.
"We're in great shape, awesome," Colts coach Chuck Pagano sarcastically said. "It's like everybody else. We're not the only one that's pregnant right now. We got what we got and we have a job to do and we're going to get it done."